I really like the cleanness of the graphics (and the figures remind me a bit of Studio Ghibli). This does clarify the benefits of the heater.
Where I got a bit lost was when we got to the names and descriptions of the 8 films. The first 3 are somewhat understandable as different styles of heaters but the other 5 are not. I realize you click on the downward-facing double arrows by the title and can get a complete description of each film, and that is good. I am wondering if some very brief descriptor could appear in small letters under the film title to clue the viewer in on what the film is about -- and then they can click the downward arrows if they are interested in a more detailed description of that particular film.
For example:
Sneaky Heat: How we built a shippable core
Hot Rocket: Tiny home and pocket rocket design
Fire Science: How rocket stoves and rocket mass heaters work
Boom Squish: Dangers and strategies of alternative hot water
There is a lot of white space around the movie reviews and Instructor bios that leads to much more scrolling before you get to the Buy invitation. This seems like a place you could lose people. Maybe condense the white space or move these two sections below the first Buy invitation?
I live in the area hit hardest by hurricane Helene and I have to say that you should be doing outreach to some of the radio/TV/podcasters in the area with your pitch. We only have one TV station that might run a clip of one of your films and do an interview (WLOS, an ABC affiliate), but if you adapted an audio pitch on why rocket mass heaters would be good for the area, you might get radio and podcast play. I think you may have a natural market here. As the weather turns (a couple weeks later than usual), people will start to think about backups and alternatives. They very much prefer what will give them independence and self-reliance.
[Hint: if hurricane Helene had hit one month later -- still well within hurricane season -- and we were sitting here without electricity, water, cell service or internet, one of these could have kept a family/home/pipes from freezing during storm recovery. In our more rural areas, it still could.]
Good luck with this project. I certainly understand more about the heaters after studying your new marketing piece.